DE2337978A1 - Antistatic yarn - includes metal fibres of polygonal section with sharp corners - Google Patents

Abstract

A substantial number of the metal fibres are at the exterior of the yarn, pref. in clusters or surrounding clusters of nonmetal fibres, and some metal fibres extend along the yarn.

Description

PATENT ADVOCATE DIPL.-PHYS. JOHN SPIES

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8 MÜNCHbiN 22 WIDENMAYERSTRASS ^ 48 TELEPHONE: (0811) 226917. SHORT TELEGRAM ADDRESS: PATOMIC MÜNCHEN

Nippon Seisen Co., Ltd., Osaka / Japan

Antistatic yarn

The invention relates to yarns or threads or fibers, and more particularly to a novel and improved antistatic Yarn or anti-static thread made from both metallic and non-metallic Threads or fibers is composed.

It is known per se that electrostatic charges, for example easily built up on carpets, rugs, clothing and other textile products by friction, which are made of synthetic threads or fibers. To the build up of such static electricity and the to prevent the resulting sparkover, Yarns or threads made from a mixture of synthetic fibers or threads have been widely used and metallic fibers such as fibers

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or threads made of stainless steel. When producing this type of yarn or thread, it is important to to achieve that the metallic and the non-metallic fibers or threads are sufficiently united with one another are to form a coherent whole that can be used as a yarn or thread.

The prior art has shown some degree of such cohesion antistatic yarns or threads achieved, whereby non-metallic fibers or threads with metallic fibers or Threads have been united, the surface irregularities of which are inevitably generated during molding, unsanded or have been left unpolished. However, it has been found that the antistatic effect of this Yarns or threads according to the prior art is unsatisfactory because the metallic fibers or threads mostly buried within the yarn, or in some cases around the strands of non-metallic fibers or filaments with a suitable pitch have been wound around in a spiral or coil shape. This way the build-up becomes more static Electricity is only prevented at those points on the yarns or threads where the non-metallic ones are Fibers or threads are in contact with the metallic fibers or threads, but not in other parts in which the non-metallic fibers or threads are in contact with one another or with one another.

In view of the aforementioned difficulties and disadvantages of the prior art, the invention is intended to provide a novel and improved antistatic yarn or a corresponding antistatic thread are provided in which metallic and non-metallic fibers in such a way

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are united with each other that the structure is more static Electricity is prevented unchanged or without change by or over the length of the yarn or thread.

Furthermore, an antistatic yarn or an antistatic thread is to be created with the invention, wherein the metallic and the non-metallic fibers or threads in an advantageous state of adhesion or the Are cohesion.

Because of this objective and other desired advantages, which are explained in more detail below, is with the invention An antistatic yarn or an antistatic thread has been created in which a plurality of non-metallic Fibers or threads are united with a plurality of metallic fibers or threads, each of the metallic fibers or each of the metallic threads has a substantially polygonal cross section, both of these types of fibers or threads are united with one another in such a way that the metallic fibers or threads are substantially are arranged on the circumference of the yarn or thread. The non-metallic and the metallic fibers or threads can be combined with one another either individually or in the form of strands, layers or plies.

The foregoing and other advantages and features of the invention are particularly preferred in the following with reference to some which are shown in principle in FIGS. 1-3 of the drawing Embodiments explained in more detail; show it:

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■ k-

Fig. 1 is a perspective view of an antistatic yarn or thread according to a preferred embodiment the invention;

Figure 2 is an end or cross-sectional view of another preferred embodiment of the invention; and

5 also shows an end or cross-sectional view of a further preferred embodiment example the invention.

Referring generally to Figs. 1-3, it is illustrated that the antistatic yarn or the antistatic Thread according to the invention from a plurality of metallic fibers or threads 1 and a plurality of non-metallic fibers Fibers or threads 2 is composed, each metallic fiber or each metallic thread one has a substantially polygonal or polygonal cross-section and the non-metallic fibers or threads, for example Usual chemical fibers or threads or cotton fibers or threads can be. The metallic fibers or threads, which are used in the antistatic yarn of the present invention can be made of stainless steel be formed, or, if desired, of gold or silver, which are widely used for the production of gold or Silver threads or threads have been used. Aside from some special purposes, however, fibers can be preferred or stainless steel threads are used.

According to the invention it is necessary or indispensable that the cross section of each of the metallic fibers or of each of the metallic threads is essentially polygonal,

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namely, it can be triangular, square, pentagonal, hexagonal, etc., or the like. Accordingly, each of the metallic Threads or each of the metallic fibers in the antistatic yarn or thread according to the invention are used, several edges or corners 3 »which extend in the longitudinal direction of the thread or the fiber.

These metallic and non-metallic fibers or threads are spun into some kind of antistatic yarn, Examples of which are shown in FIGS. 1-3, namely the spinning takes place in such a way that the metallic fibers or threads are arranged essentially on the circumference of the structure, which is formed from both types of fibers or threads has been, over its entire length. It is not absolutely necessary that all metallic fibers or threads are arranged outside the non-metallic fibers or threads. The advantages of the present invention can also be achieved if a substantial part of the metallic fibers or threads on the circumference of the yarn or Thread are arranged.

Prevent the yarns or threads formed in accordance with the proposals of the present invention the build-up of static electricity, as explained in more detail below. The metallic fibers or threads 1 of polygonal cross-section, which are arranged essentially on or in the circumference of the yarn or thread, have corners 3, which extend along the yarn or thread and which are either exposed to the outside or below the surface of the Threads or threads are buried. Therefore, when electrostatic charges build up on any part of the yarn As a result, the relatively sharp-edged ones collect

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Edges 3 of the metallic fibers or threads 1 the charges and distribute or dissipate these charges over the entire length of the yarn or thread. In the cases in which most of the metallic fibers or threads are exposed on the surface of the yarn or thread, as in the examples 1 or 3, they also act to the effect that they also disperse or distribute those charges which are built up on the surfaces of other yarns or threads in contact with them. It is now without further ado It can be seen that the concentration of electrostatic charges and the resultant sparking of the charges is because of this can be successfully prevented because the metallic fibers or threads 1 of polygonal cross-section substantially are arranged on or in the circumference of the yarn or thread over its length.

Metallic fibers or filaments generally have one higher specific density than non-metallic fibers or threads. In addition, it should be noted that such metallic fibers or threads, if they are arranged linearly along the length of a yarn or thread, usually not in an advantageous or useful manner with those also used to form the antistatic yarn or «thread used non-metallic fibers or threads unite. However, each of the metallic fibers or threads according to the present invention has a plurality of relatively sharp-edged corners 3 »which are im essential help or contribute that the metallic fibers or threads to the non-metallic fibers or threads 2 are bound or connected to these, so that both types of fibers or threads in an advantageous State of cohesion can be kept in which

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they are suitable for use as yarn or thread.

For the purpose of a more detailed explanation and illustration of the invention, some examples are given below, however, to which the invention is not limited.

Embodiment I.

In the first preferred embodiment of the invention, which is shown in principle in FIG. 1, each of the metallic fibers or each of the metallic threads 1 made of stainless steel or the like has an approximately hexagonal cross section, and the non-metallic fibers or threads 2, For example, conventional synthetic fibers or threads are joined with the aforementioned metallic fibers or threads so that a single yarn or a single thread k is formed, in such a way that the metallic fibers or threads 1 predominantly on the circumference of the Yarn or thread are arranged. Each of the metallic fibers 1 or each of the metallic threads 1 has a diameter of approximately 3 microns, and each of the non-metallic fibers 2 or each of the non-metallic threads 2 has an equal or similar diameter.

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Embodiment II

In another preferred embodiment of the invention, illustrated in Figure 2, the yarn comprises 5a or the thread 5a has several layers, plies or strands 6 of non-metallic fibers or threads 2, which are arranged essentially in the middle, and other layers, Layers or strands are essentially on or on the outside of the centrally arranged layers, layers or Strands 6 of the non-metallic fibers or threads arranged, these other layers, plies or strands always being metallic Have fibers or threads 1 of polygonal cross-section, which are arranged on or in the circumference thereof, so that they enclose the non-metallic fibers or threads 2.

Embodiment III

Fig. 3 shows a further preferred embodiment of the invention, in which the yarn or the thread 5b several Has layers, plies or strands of non-metallic fibers or threads 2 which are arranged essentially in the middle, so that they are enclosed or almost enclosed by layers, plies or strands 1 'of metallic fibers or threads 1 are. The fiber or the individual threads of the embodiments shown in FIGS. 2 and 3 are finer than those of the embodiment of FIG. 1.

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In summary, the invention relates to an arrangement of metallic fibers or threads, for example from consist of stainless steel in such a way that they are arranged essentially on or on or in the circumference of a yarn, so that they include non-metallic fibers or threads, such as a wide variety of synthetic or natural ones Fibers or threads. Each of the metallic fibers or each of the metallic threads has a polygonal one Cross-section such that the relatively sharp-edged corners of these metallic fibers or threads over the entire Extend the length of the yarn. The electrostatic charges that have built up on any part of the yarn are, are effectively collected by the sharp corners of the metallic fibers or threads and over the entire Length of the metallic fibers or threads distributed or scattered.

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Claims (4)

- Öö - -fo- Patent claims Antistatic yarn or thread, which or which essentially consists of a mixture of metallic Fibers or threads and a plurality of non-metallic fibers or threads consists or such a mixture comprises, characterized in that the metallic fibers or threads (1, 1 ') have a substantially polygonal cross section and are substantially are arranged on the circumference of the yarn or thread (4, 5a, 5b). 2. Yarn or thread according to claim 1, characterized in that all metallic fibers or threads (l, I ¹ ) have a polygonal cross section. 3 · yarn or thread according to claim 1 or 2, characterized in that the non-metallic Fibers or threads (2) are combined into individual layers, plies or strands (4, 6), the metallic Fibers or threads (l, 1 ') essentially on the circumference of the Layers, plies or strands (4t) are arranged, which in turn are located on the circumference of the yarn or thread (5a) . 4. Yarn or thread according to claim 1 or 2, since you rch characterized in that the non-metallic fibers or threads (2) to layers, plies or strands (6) and the metallic fibers or threads (l, I ¹ ) also are combined into layers, plies or strands (1 '), the latter being arranged on the circumference of the yarn or thread (5b). 409886/1201